SOLUTION: How do I type in logb2 into my calculator. I have the answer to this problem which is .3562 but I can't figure out how my teacher got that answer on my ti-83 calculator.

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Question 237811: How do I type in logb2 into my calculator. I have the answer to this problem which is .3562 but I can't figure out how my teacher got that answer on my ti-83 calculator.
Found 2 solutions by Theo, College Student:
Answer by Theo(13342) (Show Source):
You can put this solution on YOUR website!
log of x to the base 2 is equal to the log of x divided by the log of 2 on your calculator.

calculators are set to take the log to the base 10.

any logs to a base other than 10 have to be converted.

log of x to the base 2 is equal to log of x to the base 10 divided by log of 2 to the base 10.

that's equivalent to taking the log of x and dividing it by the log of 2 on your calculator.

you enter the number and hit the log key to get the log of that number.

you store that in m1 (memory location 1).
you enter 2 and hit the log key to get the log of 2.

you store that in m2.

you then take m1 and divide it by m2 to get the log to of x to the base 2.

An example:

log of 8 to the base 2 is equal to 3 because 2^3 = 8

to get the log 8 to the base 2 on your calculator, do the following:

get the log of 8 and store it in m1.

get the log of 2 and store it in m2.

divide m1 by m2.

the answer should be 3.

you can do the same thing using the ln function and you will get the same answer.

get ln of 8 and store in m1.

get ln of 2 and store in m2.

divide m1 by m2 to get 3.

Answer by College Student(505) (Show Source):
You can put this solution on YOUR website!
I have a Ti-84. I don't know the shortcut, but you can find it using the Catalog feature. In my version I need to press [2nd}, then [0]. Then scroll down until I see the "log" function.
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Hope this helps.